Inspection Procedure 4: Communication with the Sunroof Motor Assembly
(Sunroof-ECU) is not Possible.
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Whenever the ECU is replaced, ensure that the power
supply circuit, the grounding circuit and the communication circuit are
normal.
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COMMENTS ON TROUBLE SYMPTOM
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The sunroof motor assembly, the power supply
circuit or the communication circuit for that assembly may be
defective.
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- Malfunction of the sunroof motor assembly
- Damaged harness wires and connectors
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STEP 1. ECU check on the SWS monitor
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Check that the power supply and earth lines to
the ETACS-ECU and the SWS communication lines are normal.
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OK: "OK" is displayed on the
"ETACS ECU" menu.
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Q.
Is the check result normal?
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 Go to Step 2.
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 Refer
to Inspection Procedure 2 "Communication with the ETACS-ECU is not possible
 ."
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STEP 2. Connector check: E-03 sunroof motor assembly
connector
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Q.
Is the check result normal?
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Go to Step 3.
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Repair
the defective connector.
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STEP 3. Voltage measurement at E-03 sunroof motor assembly
connector.
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(1)Disconnect the connector, and measure at the wiring
harness side.
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(2)Voltage between E-03 sunroof motor assembly connector
terminal No.1 and body earth
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Q.
Is the check result normal?
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Go to Step 5.
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Go to Step 4.
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STEP 4. Check the wiring harness between E-03 sunroof motor assembly
connector terminal No.1 and fusible link (4).
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| note |
Prior to the wiring harness inspection, check
intermediate connectors D-130, D-238, and repair if necessary.
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- Check the power supply line for open circuit.
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Q.
Is the check result normal?
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The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to use troubleshooting/Inspection Service Points ).
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Repair
the wiring harness.
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STEP 5. Voltage measurement at E-03 sunroof motor assembly
connector.
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(1)Disconnect the connector, and measure at the wiring
harness side.
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(2)Turn the ignition switch to the ON position.
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(3)Voltage between E-03 sunroof motor assembly connector
terminal No.2 and body earth
OK: System voltage
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Q.
Is the check result normal?
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Go to Step 7.
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Go to Step 6.
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STEP 6. Check the wiring harness between E-03 sunroof motor assembly
connector terminal No.2 and ignition switch (IG2).
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Prior to the wiring harness inspection, check
intermediate connector D-130, junction block connectors D-403 and D-410,
and repair if necessary.
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- Check the power supply line to the ignition switch (IG2) for open
circuit.
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Q.
Is the check result normal?
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The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to use troubleshooting/Inspection Service Points ).
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Repair
the wiring harness.
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STEP 7. Resistance measurement at E-03 sunroof motor assembly
connector.
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(1)Disconnect the connector, and measure at the wiring
harness side.
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(2)Continuity between E-03 sunroof motor assembly connector
terminal No.5 and body earth
OK: Continuity exists (2 Ω
or less)
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Q.
Is the check result normal?
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Go to Step 9.
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Go to Step 8.
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STEP 8. Check the wiring harness between E-03 sunroof motor assembly
connector terminal No.5 and body earth.
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- Check the earth wires for open circuit.
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Q.
Is the check result normal?
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The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to use troubleshooting/Inspection Service Points ).
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Repair
the wiring harness.
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STEP 9. Connector check: D-420 ETACS-ECU connector
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Q.
Is the check result normal?
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Go to Step 10.
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Repair
the defective connector.
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STEP 10. Check the wiring harness between E-03 sunroof motor assembly
connector terminal No.10 and D-420 ETACS-ECU connector terminal
No.59.
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| note |
Prior to the wiring harness inspection, check
intermediate connector D-130, and repair if necessary.
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- Check the communication lines for open circuit.
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Q.
Is the check result normal?
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Go to Step 11.
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Repair
the wiring harness.
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STEP 11. ECU check on the SWS monitor
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Check that the power supply and earth lines to
the sunroof motor assembly and the SWS communication lines are
normal.
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- Turn the ignition switch to the ON position.
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OK: "OK" is displayed on the
"SUNROOF ECU" menu.
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Q.
Is the check result normal?
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The
trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to use troubleshooting/Inspection Service Points ).
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Replace the sunroof motor
assembly.
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